Converting single bathroom sink to double sinks

**dlarrivee** · 03-26-2011, 09:24 PM

Besides the venting issue, would you honestly be proud to have a tail piece under one sink that is 4" longer than the other? I would view that as a mistake as a prospective buyer of the home...

**Terry** · 03-26-2011, 11:13 PM

The minimum wet vent is a 2" pipe.
To keep the venting working right, I would still separately vent them.

**SacCity** · 03-27-2011, 12:08 AM

Minimum wet vent is 2",
Well I screwed that one up yesterday on a repair.
Thanks for correcting me.
Michael

**maxxfusion** · 03-27-2011, 07:30 AM

I am going to get my parts today. So just to confirm to do the method Terry recommended i will need 4 san tees and 2 45s? I already got the 2 90s.

Also I should measure up 42" from the first san tee to connect the second san tee for the venting?

**dlarrivee** · 03-27-2011, 09:19 AM

Incorrect, the offset of the stack is created with wyes and 45s, not santees... the santees are where the trap arm ties in...

You need 2 wyes, 2 santees, 2 45s (street in his photo)... and pipe obviously...

You already have 2 90s, but are they long radius or vent ells?

I'd be installing a clean out below the lower wye myself.

**maxxfusion** · 03-27-2011, 09:24 AM

They are regular 90s not vents. Is that ok.

**Terry** · 03-27-2011, 09:38 AM

Regular or medium 90's are fine.
I quit carrying vent 90's a long time ago on my vans.

**maxxfusion** · 03-27-2011, 04:32 PM

Thanks guys for all your help. I got all the parts today and got all the abs pipe installed according to the picture. I have to go back and exchange my elbows because they are the vent elbows. I really thought i got the regular 90s.

**dlarrivee** · 03-27-2011, 05:34 PM

Originally Posted by maxxfusion

Thanks guys for all your help. I got all the parts today and got all the abs pipe installed according to the picture. I have to go back and exchange my elbows because they are the vent elbows. I really thought i got the regular 90s.

That's the biggest annoyance about big-box stores, a lot of them only stock short radius and vent fittings and most wholesalers don't like helping homeowners out and aren't open weekends.

**maxxfusion** · 03-27-2011, 05:45 PM

Ya. I typically go to HD over Lowes for things but HD doesnt even carry ABS fittings. The elbows were my mistake. I must not have been paying attention when i initally grabbed them because I thought I had the regular 90s. Lowes actually carries all 3 elbows.

**maxxfusion** · 03-28-2011, 04:52 AM

Quick question. After I get my 90s today and put them on how long should i make my pipes that stick out from the wall?

**cwhyu2** · 03-28-2011, 05:16 AM

I do not glue the stubbs untill the cabinet is in.

**My Dream** · 05-04-2011, 07:24 AM

Morning everyone, hope everyone is well.

I've been racking my brain trying to figure out the proper way to extend the supply lines as well as drain/vent assembly, but would prefer some advice since this forum came highly recommended. I'm located close to Toronto Ontario, Canada and am a sheet metal worker by trade. I'm comfortable sweating pipes as well as working with abs.

Details:

Picture #1,2.3

Vanity is 61" with an open back so I'd like to make all rough in close to the sink with shuts offs. Since there are drawer in the center that will make installation much more easy I'm hoping.

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I have more pictures and details as well as how I believe it should be roughed in but I'm only allowed 4 images so if I'm allowed I can post more on another post.

Thanks

Frank

**My Dream** · 05-04-2011, 09:24 AM

Seems it's been merged so I'll carry on.

Picture #4

This is the present rough in and I've given rough dimensions where both sinks will be set. Builder didn't put any shut off so I improvised. Oh and I know I shouldn't have tiles so much but I got carried away.

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Picture #5,6,7

I'm going to renovate a second ensuite bathroom next so rather then open up the present bathroom I removed the main shower/tub wall in the opposite bathroom since it seemed the logical route. Therefore....this is what is inside the wall but only up to a 33" length.

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**My Dream** · 05-04-2011, 09:33 AM

Picture #8,9,

Are above attic rough in, where the romex wire and the black plastic runs accross the joist is above the inside wall that has been opened up.

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Picture #10,11

I'm not pc savy so this was the only way I could do photo's.....sorry. Since I believe the original drain is vented via the main stack, I'd like to place another vent between drain #1 and #2 vertical into the attic and accross and "T" into the smaller abs. Are the highlighted marks visible?

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